IUBMB Enzyme Nomenclature


Accepted name: L-tyrosine isonitrile desaturase

Reaction: (2S)-3-(4-hydroxyphenyl)-2-isocyanopropanoate + 2-oxoglutarate + O2 = (2E)-3-(4-hydroxyphenyl)-2-isocyanoprop-2-enoate + succinate + CO2 + H2O

Glossary: (2S)-3-(4-hydroxyphenyl)-2-isocyanopropanoic acid = L-tyrosine isonitrile
paerucumarin = 6,7-dihydroxy-3-isocyanochromen-2-one

Other name(s): pvcB (gene name)

Systematic name: (2S)-3-(4-hydroxyphenyl)-2-isocyanopropanoate,2-oxoglutarate:oxygen oxidoreductase

Comments: The enzyme is a member of the Fe2+, 2-oxoglutarate-dependent oxygenases and requires Fe2+. It has been characterized from bacteria that form the isonitrile-functionalized compound paerucumarin. cf. EC, L-tyrosine isonitrile desaturase/decarboxylase.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Clarke-Pearson, M.F. and Brady, S.F. Paerucumarin, a new metabolite produced by the pvc gene cluster from Pseudomonas aeruginosa. J. Bacteriol. 190 (2008) 6927-6930. [PMID: 18689486]

2. Drake, E.J. and Gulick, A.M. Three-dimensional structures of Pseudomonas aeruginosa PvcA and PvcB, two proteins involved in the synthesis of 2-isocyano-6,7-dihydroxycoumarin. J. Mol. Biol. 384 (2008) 193-205. [PMID: 18824174]

3. Zhu, J., Lippa, G.M., Gulick, A.M. and Tipton, P.A. Examining reaction specificity in PvcB, a source of diversity in isonitrile-containing natural products. Biochemistry 54 (2015) 2659-2669. [PMID: 25866990]

[EC created 2018]

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